$ git clone -n https://src.fedoraproject.org/rpms/sdrpp.git /var/lib/mock/f40-build-2270433-54816/root/chroot_tmpdir/scmroot/sdrpp
Cloning into '/var/lib/mock/f40-build-2270433-54816/root/chroot_tmpdir/scmroot/sdrpp'...
$ git fetch origin ad4790c9e660d8a1dee9904d4d2b81b52a817563:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/sdrpp
 * [new ref]         ad4790c9e660d8a1dee9904d4d2b81b52a817563 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad4790c Rebuilt for new volk